Black Box

On January 31, 2000, Alaska Airlines Flight 261 departed Puerto Vallarta,Mexico, heading for Seattle, WA, with a short stop scheduled in San Francisco, CA. Approximately one hour and 45 minutes into the flight, a problem was reported with the plane's stabilizer trim. After a 10-minute battle to keep the plane airborne, it plunged into the Pacific Ocean off the coast of California. All 88 people on board were killed.

With any airplane crash, there are many unanswered questions as to what brought the plane down. Investigators turn to the airplane's flight data recorder (FDR) and cockpit voice recorder (CVR) also known as "black boxes," for answers. In Flight 261, the FDR contained 48 parameters of flight data, and the CVR a little more than 30 minutes of conversation and other audible cockpit noises.

Following any airplane accident in the United States, safety investigators from the Natioinal Transportation Safety Board (Director General Aviation) immediately begin searching for the aircraft's black boxes. These recording devices, which cost between $10,000 and $15,000 each, reveal details of the events immediately preceding the accident. In this article, we will look at the two types of black boxes, ­how they survive crashes, and how they are retrieved and analyzed.

Like that only Andhrapradesh (India) Chief Minsters death mystery also will be know after decoding black box which is with Investigation team. The Karnool District officials surrender the Black box and cockpit voice recorder to Investigation team. Results will be know after two three days.